Stereotype printing plate



Dec. 1%, 19 23.

HAWfiZQ) H. A. w. wow

STEREOTYPE PRINTING PLATE 2 Sneaks-Sheet 1 Original Filed Oct. 17, 1912 Dec. 1%, 1923. mw m H. A. W. WQOD STEREOTYPE PRINTING PLATE Original Filed Oct. 17,. 1912 2' Sheets-Sheet 2 flay. we zwa Patented Dec. 18, 1923. a

Ltlhtdll nanny A. woononnnw roan, n. Y., nss enoa 'ro :rnn woon ,nnwsrnrna iuncnnvnny conrona'rron, or new YonK; 1v. A cosroanrron or VIRGINIA.

STEB EOTYPE PRINTING PLATE.

January 14, 1920.

To all whowtit may concern:

Be it known that L'HENRY A. WrsnWoon, a citizen ofthe United States, residing at New York, in the county ofNew York and State f New York, have invented a new and useful Stereotype Printing Plate, of which the following is a specification.

This is a division of my Patent No.

1,341,608 originally filed October 17, 1912, Serial No. 726,239, renewed October 13, 1919, Serial No. 330,520, and patented May 25, 1920, on machine for casting, finishing and cooling stereotype printing plates.

The principal objects of this? invention are to provide a printing plate suitable for use with the mechanism shown'in the said original application, and more specifically to provide the plate with simple means cast as a part of it by which the retarding means set forth in said application can effectively act on the plate to hold it back while passing down the inclined pathway; to provide means extending into the cast plate from the casting mechanism for retaining the plate on the core While it is moved out of the'back by the core; to provide the plate with a stop thereon located on the tail to limit the downward motion of the plate and hold the'tailon a taild'elivering device as shown therein; and to provide all these elements in such relation to the late as not to interfere with the travel of the plate down the incline, or the finishing of its interior surface.

Reference is to be had to the accompanying drawings, in which Fig. 1 is a side view, partly broken away, of a semi-cylindrical stereotype printing plate constructed in accordance with this invention and showing it as supported in position on an inclined runway;

Fig. 2 is a longitudinal sectional view of part of the plate on enlarged scale, showing a retarding roller;

Fig. 3 is a transverse sectional View of the plate shown as located on the core in which it is cast;

Fig. 4: is an enlarged fragmentary end View showing the detachment of the plate from the core, and

Fig. 5 is an inside View of the plate.

The cylinder 13 which constitutes the No. 726,239. Divided and this application filed Serial N... 351,365.

core of the plate casting box, the rest of which is not illustrated'herein, is provided with teeth on its outer surface for forming a central longitudinal rack 7" on the concave surface of each cast plate P. This core is also furnished with depressions for casting lugs on the concave surface of the plate above the junction of the plate proper with the tail T.

The core also has hooks 31 projecting from each of the four corners of its surface, and each having a sharp! edge projecting toward the edgeof the plate. Thus the metal of the plate is cast around that and the plate is held to and supported bythe core so asto rotate with it. At the same time the amount of metal cast beyond the hooks at the edge is so small that the hooks can be causedto break throu h it in removing the plate from the core. This is shown more clearly in Fig. 4, in which the plate is shown as moved from the core by platelifters73. It' is immaterial so far as the invention set forth herein is concerned, whether the plate-lifters are moved away from the core or the core lowered from the plate-lifters. It will be observed that; when the plate-lifters engage the plate on the core, they lift it therefrom, and at the same time force the hooks-31 to tear out of the metal and free the plate from the core.

In my original application above identified the plate descends along an inclined runway, part of which is made up of these plate-lifters 73. The plate, when in the position shown in Fig. 1, is free to slide down the runway by gravity, and in that application I have shown a retarding means for the purpose of retarding this motion and keeping the movement of the plate under the control of the operator. This was shown as comprising a pair of toothed wheels 80 in position for the teeth to engage in the teeth of the rack r as the plate moves down the runway. They also assist in supporting the plate at this time.

' Means is shown in that application for retarding the rotation of these wheels and thus controlling the sliding descent of the plate.

Also in that application I have shown the shaving knife shaft 101 as provided with a tumbling pulley 102 fixed thereon and adapted to support the tail T as it is sawed from the main part of the plate P. This pulley is of segmental form and the tail is kept free from the top of the saw 90'jby'the lugs p which are in position to contact withtheedge of the pulley. This limits the motion of the plate down the runway until the tail is cut oif. The pulley is loosely ''mounted on the shaving shaft, means being provided for positively rotating it part of the time with the shaving shaft and for freeing it therefrom later to allow it to turn by the weight. of the tail :after itiszsawed OE and discharge the same.

As the shaft rotates the tail is moved around with the plate, but when it is rotated far enoughfor more than one-half the weight of the severed tail to be on the right side, then this weight turns the loose pulley and delivers the tail in a position free to fall away from the pulley by 'gravlty.

. It will be understood, of course, that whilethe tail is being cut from the plate the interior of the latter is intended to be shaved out and the front edge trimmed up if desired.

This invention relates to the plate itself andT-I donot claim herein by themselves any part of the machine on which the plate is "finished or conveyed independently of the plate, as they are claimed in my above identified original application. Although I have illustrated and described only a single form of theinvention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims.

Therefore I do not wish to be limited to the details of construction herein shown and described, or to the particular mechanism with which the plate is shown as being used, but what I do claim is 1. As an article of manufacture, a curved stereotype printing plate having a rack cast along the surface thereof.

2. As an article of manufacturefa curved stereotype printing plate having a rack cast along the concave surface along the middle thereof. 7

3. As an article of manufacture a semicylindrical stereotype printing plate having a longitudinal rack on its inner concave surface. substantially at the center thereof'throughout the length of the plate.

4:. As an article of manufacture, a curved stereotype printing plate having a rack along the inner surface thereof, and integral means projecting inwardly from the side of said rack constituting a stop for ing lug cast on the concavesurface thereof" substantially above the junction of the plate proper and the tail thereof.

7. As an article of manufacture, a stereotype printing plate having near its edge an indentation for receiving a hook on the core of the casting mold which is adapted to fracture the edge of the plate to release it. r

In testimony whereof I have hereunto afiixed my signature.

HENRY A. WISE WOOD. 

